Spark plug pump



D; H. SPICER SPARK PLUG PUMP May 23, 1933.

Filed April 24, 1931 vns Patented May 23, 1933 UNITED STATES PATENT ol-Fice 'DELPEIN H. serena,

OFLAKEWOOD, OHIO, ASSIGNORTO SPICER AIRFLATER, IO., F CLEVELAND, GHIO, `A CORPORATION OF OHIO v sPARx PLUG PUMPY Application led April 24,

This invention relates to the art of pumping air or the like andl has particular reference to an attachment for internal combustion motors and the combination of such t attachments Withsuch motors designed to be used for compressing air or' other gases lfor such purposes as inflating pneumatic tires and the like.

I am aware that prior to my invention numerous devices have been proposed for use in connection With internal combustionmotors for intlating tires ,and similar purposes but so :tar as l am aware none of these devices are capable of producing the results accomplished by the herein described inven- 1 tion.

rlhe principal object of my invention is to provide an attachment of the character described by the use of which it is possible 2o to iniiate a tire or other receptacle to a very` high pressure with substantially pure air.

y pure air in this specication is understood air of substantially the composition ot the atmosphere at the place Where the device is used, that is, air which is substantially free from the fuel Which is employed in the internal combustion engine in connection With which the device is used and also substantially free from the products of the combustion of such fuel.

l attain the foregoing and other and more limited objects in and through the structures hereinafter described and illustrated in the accompanying drawing in which Fig. l is a schematic sectional View taken longitudinally of my device; Fig. 2 is a section on the line 2-2 of Fig. l; Fig. 3 isa section on the line 3--3 of Fig. 1; Fig. 4 is a section on the line 4-4 of Fig. l; and Fig. 5 is a section on the line 5-5 of Fig. 1.

In the drawing I have shown schematically an internal combustion engine of usual construction such as employed in automobiles, trucks and similar vehicles. rlhe numeral 10 indicates the Wall cfa cylinder4 provided with the usual Water jacket space ll defined between the Wall l0 and the external Wall 12. A cylinder head 13 of usual construction is indicated as being providedwith a spark plug opening `14 in a depres- 1931. serial no. 532,538.

including aspark plug F which is normally received inthe spark plug opening 14 but which may bev positioned as indicated in Fig. l and will be so positioned when the device is in use.

The attachment comprises an elongated pumping cylinder F having a bore G therein which acts as a pumping chamber,

a spark plug socket H, a valve assembly K, a delivery nipple L and a deliveryhose M.

The cylinder F is provided with an eX- ternally threaded lower end portion 18 of a size adapted to be received in the spark plug opening let and a shoulder 19 adapted to engage a gasket 20 for sealin the` cylinder in communication with the com ustion chamber D. It will be noted that the pumping chamber G is considerably elongated and' that the communication thereof with the Y combustion chamber D is of a large size. 'It is preferably although not necessarily the same size as the remainder of the bore G Which preferably is substantially uniform in diameter.`

The spark plug socket H is positioned near the lower end of the cylinder F and entends,- laterally outwardly therefrom. rlhis socket is so constructed that the spark plug E will not obstruct the bore G to any considerable extent. The spark plug socket H is internally lthreaded as indicated at 21 and provided Ywith a flat surface 22 adapted to cooperate with the shoulder` 23 of the spark' plug E -whereby to eiiect with the gasket 24 a seal to prevent the escape of gas when the spark plug is in position.

The upper end of the cylinder Fis pro- Ito vided with a shoulder 25 and an internally' threaded terminal portion. Positioned within said cylinder and resting oni the shoulder 25 is an annular stop or Washer member 26. Above the Washer 26 is a cup washer 27 which may be of such size asv to be pressed into snug tittinv' relation with the walls of the cylinder. This washer is provided with a central aperture 28. Between the washers 26 and 27 is a loosely mounted cut-oil disk 29 provided with a small central aperture 30 and marginal cut-outs 3l. Above the Washer 27 is a valve disk 32 constructed of heat resistant rubber, fiber or soft metal and provided with a central opening 33. I y

Threaded into the .upper end of the cylinder F is a plug N which is provided with a seriesv of openings 34 extending around the edge thereofI and having a central hollow projection 35 provided with a central valve chamber 36 and a reduced opening 37. A ball 38`is positioned in the valve chamber 36 and cooperates with the restricted opening 37 andthe shoulder Which vconnects it with the chamber 36 to form a check valve adapted to prevent the entrance of air through the opening 37 into the pumping chamber G. Threaded into the upper-:end of the projection 35 is a delivery nipple 39 which is provided with a bore 40 and a kerfed lower face provided with one or more kei-fs 4l intersecting the bore 40 lto prevent, the ball 38 from obstructing the passage of,

air through the bore 40. Connected to the nipple 39 is the hose M which may hare a flexible' metallic portion 42 and a rubber or rubber and fiber port-ion 43.v Y

The valve structure described is designed to allow the ingress of air to the chamber G on the intake stroke with the greatest possible freedom while operating tocut od escape 'of air therefrom on the compression and firing strokes. In the use of thisdevice with the parts in the positions indicated and the spark plug connected with a highpotential electric supply, the operation will be as follows'. On the intake stroke of the motor an explosivemixture will ow into the combustion chamber D through the intake valve in the usual manner while fresh air will flow through the openings 34 into the pumping chamber Gr. Theflength and diameter of the chamber G is so selected p with reference to the resistance of the valve mechanism to the passage of air and theentire attachment will be so related to the resistance of the carburation'device to the passage of air and fuel into the combustion chamber D that under thel various conditions of use-little or no combustible mixture 'wlll lind its way into the-upper portionof the chamber G. On the 'compression stroke of the motor the. combustible mixture will rise in the chamber G but willing@ en@ its Way into the upper portion thereof. lt is desirable that on the compression stroke of the motor the'combustible mixture should rise to a point at least as high as the sparking points of the spark plug E. lt is allowable that it should rise somewhat above these points but it should not find its way into the-upper portion of the chamber. On the explosion stroke of the cylinder to which the device is attached a very considerable y pressure will be produced in the combustion chamber D and the gaseous products of combustion of the fuel'will force the fresh air contained in the chamber G out through the outlet check valve into the hose M. It is to be expected that `there will be some mixture of the fresh air -with the products of combustion in the chamber G but on account" of the narrow and elongatedlnature of this chamber the zone of mixing of such gases with the fresh air will be comparatively narrow and inembodimcnts 'of the i11- vention vcorra'actly designed with reference to the conditions of use the zone of mixed air and produc@ of 'combustion will remain below the outlet check valve whereby only fresh air will be pumped through the hose-M.

It is to be noted that by positioning the inlet valve mechanism adjacent the outlet valve mechanism at the upper end of the pumping cylinder; a mixture of the products of combustion withthe fresh air is avoidedi If. the inlet valve were ositioned lower down, fresh air might be a mitted below the region of contact between the products of combustion and fresh air thereby cuttingbil a portionv of the Iproducts of combustion above the fresh air inlet and allowing the .saline to mix with the fresh air. By the use of la substantially-straight pumping chamber-l extending vertically rom the spark plug opening in the motor, I secure not only av minimum ofresistance to the passage ot gases in the .pumping chamber, but also reater convenience in connecting the pumpmg unit with .the motor. .U

For the best results, the various elements of the device shouldy be so proportioned and of such dimensions that on the intake stroke,

a suiiicient 'amount of air will be drawn in to fill the .pumpin chamber substantially or completely full ut' not enough to cause anyl appreciable amount to enter the combustion chamber of the motor and thereby dllute .the

combustible mixture. a

Other means may be employed as a substitutev for the portion of metallic hose towith the scope of the appended claims.

Havingthus described my invention, what I claim is:

l. In combination with' a cylinder of an internal combustion motor of usual construction including a piston, inlet and exhaust valves, timed means for operating said valves, 'and means for supplying fuel; an ignition means in communication with the combustion chamber of said motor, and an explosion plump cylinder also in communication with said combustion chamber and having adjacent the end remote from said combustion chamber an outlet-check-valve means and being provided with an inlet-checki valve means communicating between the interior'thereof and outside atmosphere.

2. in combination with a functioning cylinder of an internal combustion motor, wall means dening an elongated pumping cham-` ber, means connecting said pumping chamber in communication with the combustion` chamber of said motor, means for connection of said chamber with a delivery device, an outlet-checlr-valve adjacent said last means, and low resistance inlet-checlr-valve means communicating between said pumping chambei' and outside atmosphere.

3. In combination with a functioning cylinder of an internal combustion motor, wall means dening an elongated pumping chamber, means connecting said pumping chamber in communication with the combustion chamber oi said motor, means for connection of said chamber with a delivery hose, an outlet-checls-valve adjacent said last means, and low resistance inlet-check-valve means cominunicatin between said pumpine1 chamber and outside atmosphere.

4. An explosion pump unit adapted to be connected with the combustion chamber oan internal combustion motor, including, wall means definingv an elongated pumping chamber, a spark plug receiving socket formed in connection with said wall means' and communicating with said pumping chamber, means for connection of said chamber to a delivery hose, an outlet-check-valve adjacent said 'last means, and low resistance Iinletcheck-valve means communicating between said pum in chamber and outside atmos' phere, said inlet-check-valve comprising a plurality of o ningsl formedv iin saidwall means, a shoul er spaced from said openings, and a Vgasket loose y mounted between said openings and said shoulder. l 5.' Infcombination with a. functioning Vcyl inder of an internal combustion motor, wall means denng an elongated pumping chamber, means connecting said pumping chamchamber of said motor, means'for' connection of said chamber with a delivery hose, an outlet-check-valve adjacent said last means, and low resistance inlet-check-valve means conimunic'atin between said pumpingchamber and outsi e atmosphere, said inlet-check- -valve comprising va plurality of openings formed in said wall means, a shoulder spaced from said openings, and a gasket loosely mounted between said openings and said shoulder.

6. In a device of the character described, a cylinder having one threaded end, a spark plug socket formed in connection with said vcylinder and extending laterally therefrom a plug in the opposite end of vsaid cylinder, an annular, marginal series of openings eX- tending through said plug, a central opening through said plug, a hose nipple communieating with said central opening, a ball.

valve controlling said central opening and acting as an outlet-check-valve, an annular shoulder spaced from the bottoni of said plug, and an annular gasket between said openings in said plug and said shoulder.

7. The method of introducing fresh air under pressure into a receiver Whichconsists i in establishing communication through an elongated passage between said receiver and the combustion chamber oi a cylinder ot an internal combustion motor during-the iirin strokes of such cylinder and cutting oii sai communication and clearing said passage of cylinder gases and replacing such gases with resh air-between firing strokes.

ln testimony whereoi, l hereunto ama my signature.

DELPHIN H. SPICER.

-ber in communication with the combustion ico ll l@ les 

